Duro Bicycle Tube 20 x 1.75/2.125 F/V

High-pressure inner tube engineered for 20-inch wheels with 1.75–2.125" tyre widths. Features a Presta valve for precise inflation control and compatibility with modern bike systems. Durable butyl rubber construction resists punctures and maintains pressure retention across varied terrain. Essential replacement or spare for folding bikes, BMX, and compact wheel builds. Tested for reliability in Australian riding conditions.